76899 is a 34 piece, MaxxTor® impact bit set. Wiha's MaxxTor® bits are impact rated for power tools and rigorously heat-treated to produce a bit lasting up to 120 times the service life compared to standard bits. This MaxxTor® Impact bits have the standard 1/4" hex drive for universal application and are available in 1" and 2" lengths for versatile utility. With MaxxTor® Impact bits user get the tightest-fit precision-machined driver tips from the company that sets the standard for quality and performance. Wiha's exact-fit tips eliminate excessive bit-wobble for increased driver accuracy. The result is a highly stable engagement with the screw head and a reduction in fastener cam-out that can lead to injury or damage to finished materials.